ivtv-yuv.c 37.7 KB
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/*
    yuv support

    Copyright (C) 2007  Ian Armstrong <ian@iarmst.demon.co.uk>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "ivtv-driver.h"
#include "ivtv-udma.h"
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#include "ivtv-yuv.h"
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/* YUV buffer offsets */
const u32 yuv_offset[IVTV_YUV_BUFFERS] = {
	0x001a8600,
	0x00240400,
	0x002d8200,
	0x00370000,
	0x00029000,
	0x000C0E00,
	0x006B0400,
	0x00748200
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};

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static int ivtv_yuv_prep_user_dma(struct ivtv *itv, struct ivtv_user_dma *dma,
				 struct ivtv_dma_frame *args)
{
	struct ivtv_dma_page_info y_dma;
	struct ivtv_dma_page_info uv_dma;
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	struct yuv_playback_info *yi = &itv->yuv_info;
	u8 frame = yi->draw_frame;
	struct yuv_frame_info *f = &yi->new_frame_info[frame];
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	int i;
	int y_pages, uv_pages;
	unsigned long y_buffer_offset, uv_buffer_offset;
	int y_decode_height, uv_decode_height, y_size;

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	y_buffer_offset = IVTV_DECODER_OFFSET + yuv_offset[frame];
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	uv_buffer_offset = y_buffer_offset + IVTV_YUV_BUFFER_UV_OFFSET;

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	y_decode_height = uv_decode_height = f->src_h + f->src_x;
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	if (f->offset_y)
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		y_buffer_offset += 720 * 16;

	if (y_decode_height & 15)
		y_decode_height = (y_decode_height + 16) & ~15;

	if (uv_decode_height & 31)
		uv_decode_height = (uv_decode_height + 32) & ~31;

	y_size = 720 * y_decode_height;

	/* Still in USE */
	if (dma->SG_length || dma->page_count) {
		IVTV_DEBUG_WARN("prep_user_dma: SG_length %d page_count %d still full?\n",
				dma->SG_length, dma->page_count);
		return -EBUSY;
	}

	ivtv_udma_get_page_info (&y_dma, (unsigned long)args->y_source, 720 * y_decode_height);
	ivtv_udma_get_page_info (&uv_dma, (unsigned long)args->uv_source, 360 * uv_decode_height);

	/* Get user pages for DMA Xfer */
	down_read(&current->mm->mmap_sem);
	y_pages = get_user_pages(current, current->mm, y_dma.uaddr, y_dma.page_count, 0, 1, &dma->map[0], NULL);
	uv_pages = get_user_pages(current, current->mm, uv_dma.uaddr, uv_dma.page_count, 0, 1, &dma->map[y_pages], NULL);
	up_read(&current->mm->mmap_sem);

	dma->page_count = y_dma.page_count + uv_dma.page_count;

	if (y_pages + uv_pages != dma->page_count) {
		IVTV_DEBUG_WARN("failed to map user pages, returned %d instead of %d\n",
				y_pages + uv_pages, dma->page_count);

		for (i = 0; i < dma->page_count; i++) {
			put_page(dma->map[i]);
		}
		dma->page_count = 0;
		return -EINVAL;
	}

	/* Fill & map SG List */
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	if (ivtv_udma_fill_sg_list (dma, &uv_dma, ivtv_udma_fill_sg_list (dma, &y_dma, 0)) < 0) {
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		IVTV_DEBUG_WARN("could not allocate bounce buffers for highmem userspace buffers\n");
		for (i = 0; i < dma->page_count; i++) {
			put_page(dma->map[i]);
		}
		dma->page_count = 0;
		return -ENOMEM;
	}
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	dma->SG_length = pci_map_sg(itv->dev, dma->SGlist, dma->page_count, PCI_DMA_TODEVICE);

	/* Fill SG Array with new values */
	ivtv_udma_fill_sg_array (dma, y_buffer_offset, uv_buffer_offset, y_size);

	/* If we've offset the y plane, ensure top area is blanked */
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	if (f->offset_y && itv->yuv_info.blanking_dmaptr) {
		dma->SGarray[dma->SG_length].size = cpu_to_le32(720*16);
		dma->SGarray[dma->SG_length].src = cpu_to_le32(itv->yuv_info.blanking_dmaptr);
		dma->SGarray[dma->SG_length].dst = cpu_to_le32(IVTV_DECODER_OFFSET + yuv_offset[frame]);
		dma->SG_length++;
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	}

	/* Tag SG Array with Interrupt Bit */
	dma->SGarray[dma->SG_length - 1].size |= cpu_to_le32(0x80000000);

	ivtv_udma_sync_for_device(itv);
	return 0;
}

/* We rely on a table held in the firmware - Quick check. */
int ivtv_yuv_filter_check(struct ivtv *itv)
{
	int i, offset_y, offset_uv;

	for (i=0, offset_y = 16, offset_uv = 4; i<16; i++, offset_y += 24, offset_uv += 12) {
		if ((read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + offset_y) != i << 16) ||
		    (read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + offset_uv) != i << 16)) {
			IVTV_WARN ("YUV filter table not found in firmware.\n");
			return -1;
		}
	}
	return 0;
}

static void ivtv_yuv_filter(struct ivtv *itv, int h_filter, int v_filter_1, int v_filter_2)
{
	int filter_index, filter_line;

	/* If any filter is -1, then don't update it */
	if (h_filter > -1) {
		if (h_filter > 4) h_filter = 4;
		filter_index = h_filter * 384;
		filter_line = 0;
		while (filter_line < 16) {
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02804);
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x0281c);
			filter_index += 4;
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02808);
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02820);
			filter_index += 4;
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x0280c);
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02824);
			filter_index += 4;
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02810);
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02828);
			filter_index += 4;
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x02814);
			write_reg(read_dec(IVTV_YUV_HORIZONTAL_FILTER_OFFSET + filter_index), 0x0282c);
			filter_index += 8;
			write_reg(0, 0x02818);
			write_reg(0, 0x02830);
			filter_line ++;
		}
		IVTV_DEBUG_YUV("h_filter -> %d\n",h_filter);
	}

	if (v_filter_1 > -1) {
		if (v_filter_1 > 4) v_filter_1 = 4;
		filter_index = v_filter_1 * 192;
		filter_line = 0;
		while (filter_line < 16) {
			write_reg(read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + filter_index), 0x02900);
			filter_index += 4;
			write_reg(read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + filter_index), 0x02904);
			filter_index += 8;
			write_reg(0, 0x02908);
			filter_line ++;
		}
		IVTV_DEBUG_YUV("v_filter_1 -> %d\n",v_filter_1);
	}

	if (v_filter_2 > -1) {
		if (v_filter_2 > 4) v_filter_2 = 4;
		filter_index = v_filter_2 * 192;
		filter_line = 0;
		while (filter_line < 16) {
			write_reg(read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + filter_index), 0x0290c);
			filter_index += 4;
			write_reg(read_dec(IVTV_YUV_VERTICAL_FILTER_OFFSET + filter_index), 0x02910);
			filter_index += 8;
			write_reg(0, 0x02914);
			filter_line ++;
		}
		IVTV_DEBUG_YUV("v_filter_2 -> %d\n",v_filter_2);
	}
}

static void ivtv_yuv_handle_horizontal(struct ivtv *itv, struct yuv_frame_info *window)
{
	u32 reg_2834, reg_2838, reg_283c;
	u32 reg_2844, reg_2854, reg_285c;
	u32 reg_2864, reg_2874, reg_2890;
	u32 reg_2870, reg_2870_base, reg_2870_offset;
	int x_cutoff;
	int h_filter;
	u32 master_width;

	IVTV_DEBUG_WARN( "Need to adjust to width %d src_w %d dst_w %d src_x %d dst_x %d\n",
			 window->tru_w, window->src_w, window->dst_w,window->src_x, window->dst_x);

	/* How wide is the src image */
	x_cutoff  = window->src_w + window->src_x;

	/* Set the display width */
	reg_2834 = window->dst_w;
	reg_2838 = reg_2834;

	/* Set the display position */
	reg_2890 = window->dst_x;

	/* Index into the image horizontally */
	reg_2870 = 0;

	/* 2870 is normally fudged to align video coords with osd coords.
	   If running full screen, it causes an unwanted left shift
	   Remove the fudge if we almost fill the screen.
	   Gradually adjust the offset to avoid the video 'snapping'
	   left/right if it gets dragged through this region.
	   Only do this if osd is full width. */
	if (window->vis_w == 720) {
		if ((window->tru_x - window->pan_x > -1) && (window->tru_x - window->pan_x <= 40) && (window->dst_w >= 680)){
			reg_2870 = 10 - (window->tru_x - window->pan_x) / 4;
		}
		else if ((window->tru_x - window->pan_x < 0) && (window->tru_x - window->pan_x >= -20) && (window->dst_w >= 660)) {
			reg_2870 = (10 + (window->tru_x - window->pan_x) / 2);
		}

		if (window->dst_w >= window->src_w)
			reg_2870 = reg_2870 << 16 | reg_2870;
		else
			reg_2870 = ((reg_2870 & ~1) << 15) | (reg_2870 & ~1);
	}

	if (window->dst_w < window->src_w)
		reg_2870 = 0x000d000e - reg_2870;
	else
		reg_2870 = 0x0012000e - reg_2870;

	/* We're also using 2870 to shift the image left (src_x & negative dst_x) */
	reg_2870_offset = (window->src_x*((window->dst_w << 21)/window->src_w))>>19;

	if (window->dst_w >= window->src_w) {
		x_cutoff &= ~1;
		master_width = (window->src_w * 0x00200000) / (window->dst_w);
		if (master_width * window->dst_w != window->src_w * 0x00200000) master_width ++;
		reg_2834 = (reg_2834 << 16) | x_cutoff;
		reg_2838 = (reg_2838 << 16) | x_cutoff;
		reg_283c = master_width >> 2;
		reg_2844 = master_width >> 2;
		reg_2854 = master_width;
		reg_285c = master_width >> 1;
		reg_2864 = master_width >> 1;

		/* We also need to factor in the scaling
		   (src_w - dst_w) / (src_w / 4) */
		if (window->dst_w > window->src_w)
			reg_2870_base = ((window->dst_w - window->src_w)<<16) / (window->src_w <<14);
		else
			reg_2870_base = 0;

		reg_2870 += (((reg_2870_offset << 14) & 0xFFFF0000) | reg_2870_offset >> 2) + (reg_2870_base << 17 | reg_2870_base);
		reg_2874 = 0;
	}
	else if (window->dst_w < window->src_w / 2) {
		master_width = (window->src_w * 0x00080000) / window->dst_w;
		if (master_width * window->dst_w != window->src_w * 0x00080000) master_width ++;
		reg_2834 = (reg_2834 << 16) | x_cutoff;
		reg_2838 = (reg_2838 << 16) | x_cutoff;
		reg_283c = master_width >> 2;
		reg_2844 = master_width >> 1;
		reg_2854 = master_width;
		reg_285c = master_width >> 1;
		reg_2864 = master_width >> 1;
		reg_2870 += (((reg_2870_offset << 15) & 0xFFFF0000) | reg_2870_offset);
		reg_2870 += (5 - (((window->src_w + window->src_w / 2) - 1) / window->dst_w)) << 16;
		reg_2874 = 0x00000012;
	}
	else {
		master_width = (window->src_w * 0x00100000) / window->dst_w;
		if (master_width * window->dst_w != window->src_w * 0x00100000) master_width ++;
		reg_2834 = (reg_2834 << 16) | x_cutoff;
		reg_2838 = (reg_2838 << 16) | x_cutoff;
		reg_283c = master_width >> 2;
		reg_2844 = master_width >> 1;
		reg_2854 = master_width;
		reg_285c = master_width >> 1;
		reg_2864 = master_width >> 1;
		reg_2870 += (((reg_2870_offset << 14) & 0xFFFF0000) | reg_2870_offset >> 1);
		reg_2870 += (5 - (((window->src_w * 3) - 1) / window->dst_w)) << 16;
		reg_2874 = 0x00000001;
	}

	/* Select the horizontal filter */
	if (window->src_w == window->dst_w) {
		/* An exact size match uses filter 0 */
		h_filter = 0;
	}
	else {
		/* Figure out which filter to use */
		h_filter = ((window->src_w << 16) / window->dst_w) >> 15;
		h_filter = (h_filter >> 1) + (h_filter & 1);
		/* Only an exact size match can use filter 0 */
		if (h_filter == 0) h_filter = 1;
	}

	write_reg(reg_2834, 0x02834);
	write_reg(reg_2838, 0x02838);
	IVTV_DEBUG_YUV("Update reg 0x2834 %08x->%08x 0x2838 %08x->%08x\n",itv->yuv_info.reg_2834, reg_2834, itv->yuv_info.reg_2838, reg_2838);

	write_reg(reg_283c, 0x0283c);
	write_reg(reg_2844, 0x02844);

	IVTV_DEBUG_YUV("Update reg 0x283c %08x->%08x 0x2844 %08x->%08x\n",itv->yuv_info.reg_283c, reg_283c, itv->yuv_info.reg_2844, reg_2844);

	write_reg(0x00080514, 0x02840);
	write_reg(0x00100514, 0x02848);
	IVTV_DEBUG_YUV("Update reg 0x2840 %08x->%08x 0x2848 %08x->%08x\n",itv->yuv_info.reg_2840, 0x00080514, itv->yuv_info.reg_2848, 0x00100514);

	write_reg(reg_2854, 0x02854);
	IVTV_DEBUG_YUV("Update reg 0x2854 %08x->%08x \n",itv->yuv_info.reg_2854, reg_2854);

	write_reg(reg_285c, 0x0285c);
	write_reg(reg_2864, 0x02864);
	IVTV_DEBUG_YUV("Update reg 0x285c %08x->%08x 0x2864 %08x->%08x\n",itv->yuv_info.reg_285c, reg_285c, itv->yuv_info.reg_2864, reg_2864);

	write_reg(reg_2874, 0x02874);
	IVTV_DEBUG_YUV("Update reg 0x2874 %08x->%08x\n",itv->yuv_info.reg_2874, reg_2874);

	write_reg(reg_2870, 0x02870);
	IVTV_DEBUG_YUV("Update reg 0x2870 %08x->%08x\n",itv->yuv_info.reg_2870, reg_2870);

	write_reg( reg_2890,0x02890);
	IVTV_DEBUG_YUV("Update reg 0x2890 %08x->%08x\n",itv->yuv_info.reg_2890, reg_2890);

	/* Only update the filter if we really need to */
	if (h_filter != itv->yuv_info.h_filter) {
		ivtv_yuv_filter (itv,h_filter,-1,-1);
		itv->yuv_info.h_filter = h_filter;
	}
}

static void ivtv_yuv_handle_vertical(struct ivtv *itv, struct yuv_frame_info *window)
{
	u32 master_height;
	u32 reg_2918, reg_291c, reg_2920, reg_2928;
	u32 reg_2930, reg_2934, reg_293c;
	u32 reg_2940, reg_2944, reg_294c;
	u32 reg_2950, reg_2954, reg_2958, reg_295c;
	u32 reg_2960, reg_2964, reg_2968, reg_296c;
	u32 reg_289c;
	u32 src_y_major_y, src_y_minor_y;
	u32 src_y_major_uv, src_y_minor_uv;
	u32 reg_2964_base, reg_2968_base;
	int v_filter_1, v_filter_2;

	IVTV_DEBUG_WARN("Need to adjust to height %d src_h %d dst_h %d src_y %d dst_y %d\n",
		window->tru_h, window->src_h, window->dst_h,window->src_y, window->dst_y);

	/* What scaling mode is being used... */
	if (window->interlaced_y) {
		IVTV_DEBUG_YUV("Scaling mode Y: Interlaced\n");
	}
	else {
		IVTV_DEBUG_YUV("Scaling mode Y: Progressive\n");
	}

	if (window->interlaced_uv) {
		IVTV_DEBUG_YUV("Scaling mode UV: Interlaced\n");
	}
	else {
		IVTV_DEBUG_YUV("Scaling mode UV: Progressive\n");
	}

	/* What is the source video being treated as... */
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	if (window->interlaced) {
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		IVTV_DEBUG_WARN("Source video: Interlaced\n");
	}
	else {
		IVTV_DEBUG_WARN("Source video: Non-interlaced\n");
	}

	/* We offset into the image using two different index methods, so split
	   the y source coord into two parts. */
	if (window->src_y < 8) {
		src_y_minor_uv = window->src_y;
		src_y_major_uv = 0;
	}
	else {
		src_y_minor_uv = 8;
		src_y_major_uv = window->src_y - 8;
	}

	src_y_minor_y = src_y_minor_uv;
	src_y_major_y = src_y_major_uv;

	if (window->offset_y) src_y_minor_y += 16;

	if (window->interlaced_y)
		reg_2918 = (window->dst_h << 16) | (window->src_h + src_y_minor_y);
	else
		reg_2918 = (window->dst_h << 16) | ((window->src_h + src_y_minor_y) << 1);

	if (window->interlaced_uv)
		reg_291c = (window->dst_h << 16) | ((window->src_h + src_y_minor_uv) >> 1);
	else
		reg_291c = (window->dst_h << 16) | (window->src_h + src_y_minor_uv);

	reg_2964_base = (src_y_minor_y * ((window->dst_h << 16)/window->src_h)) >> 14;
	reg_2968_base = (src_y_minor_uv * ((window->dst_h << 16)/window->src_h)) >> 14;

	if (window->dst_h / 2 >= window->src_h && !window->interlaced_y) {
		master_height = (window->src_h * 0x00400000) / window->dst_h;
		if ((window->src_h * 0x00400000) - (master_height * window->dst_h) >= window->dst_h / 2) master_height ++;
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 3;
		reg_2930 = master_height;
		reg_2940 = master_height >> 1;
		reg_2964_base >>= 3;
		reg_2968_base >>= 3;
		reg_296c = 0x00000000;
	}
	else if (window->dst_h >= window->src_h) {
		master_height = (window->src_h * 0x00400000) / window->dst_h;
		master_height = (master_height >> 1) + (master_height & 1);
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 2;
		reg_2930 = master_height;
		reg_2940 = master_height >> 1;
		reg_296c = 0x00000000;
		if (window->interlaced_y) {
			reg_2964_base >>= 3;
		}
		else {
			reg_296c ++;
			reg_2964_base >>= 2;
		}
		if (window->interlaced_uv) reg_2928 >>= 1;
		reg_2968_base >>= 3;
	}
	else if (window->dst_h >= window->src_h / 2) {
		master_height = (window->src_h * 0x00200000) / window->dst_h;
		master_height = (master_height >> 1) + (master_height & 1);
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 2;
		reg_2930 = master_height;
		reg_2940 = master_height;
		reg_296c = 0x00000101;
		if (window->interlaced_y) {
			reg_2964_base >>= 2;
		}
		else {
			reg_296c ++;
			reg_2964_base >>= 1;
		}
		if (window->interlaced_uv) reg_2928 >>= 1;
		reg_2968_base >>= 2;
	}
	else {
		master_height = (window->src_h * 0x00100000) / window->dst_h;
		master_height = (master_height >> 1) + (master_height & 1);
		reg_2920 = master_height >> 2;
		reg_2928 = master_height >> 2;
		reg_2930 = master_height;
		reg_2940 = master_height;
		reg_2964_base >>= 1;
		reg_2968_base >>= 2;
		reg_296c = 0x00000102;
	}

	/* FIXME These registers change depending on scaled / unscaled output
	   We really need to work out what they should be */
	if (window->src_h == window->dst_h){
		reg_2934 = 0x00020000;
		reg_293c = 0x00100000;
		reg_2944 = 0x00040000;
		reg_294c = 0x000b0000;
	}
	else {
		reg_2934 = 0x00000FF0;
		reg_293c = 0x00000FF0;
		reg_2944 = 0x00000FF0;
		reg_294c = 0x00000FF0;
	}

	/* The first line to be displayed */
	reg_2950 = 0x00010000 + src_y_major_y;
	if (window->interlaced_y) reg_2950 += 0x00010000;
	reg_2954 = reg_2950 + 1;

	reg_2958 = 0x00010000 + (src_y_major_y >> 1);
	if (window->interlaced_uv) reg_2958 += 0x00010000;
	reg_295c = reg_2958 + 1;

	if (itv->yuv_info.decode_height == 480)
		reg_289c = 0x011e0017;
	else
		reg_289c = 0x01500017;

	if (window->dst_y < 0)
		reg_289c = (reg_289c - ((window->dst_y & ~1)<<15))-(window->dst_y >>1);
	else
		reg_289c = (reg_289c + ((window->dst_y & ~1)<<15))+(window->dst_y >>1);

	/* How much of the source to decode.
	   Take into account the source offset */
	reg_2960 = ((src_y_minor_y + window->src_h + src_y_major_y) - 1 ) |
			((((src_y_minor_uv + window->src_h + src_y_major_uv) - 1) & ~1) << 15);

	/* Calculate correct value for register 2964 */
	if (window->src_h == window->dst_h)
		reg_2964 = 1;
	else {
		reg_2964 = 2 + ((window->dst_h << 1) / window->src_h);
		reg_2964 = (reg_2964 >> 1) + (reg_2964 & 1);
	}
	reg_2968 = (reg_2964 << 16) + reg_2964 + (reg_2964 >> 1);
	reg_2964 = (reg_2964 << 16) + reg_2964 + (reg_2964 * 46 / 94);

	/* Okay, we've wasted time working out the correct value,
	   but if we use it, it fouls the the window alignment.
	   Fudge it to what we want... */
	reg_2964 = 0x00010001 + ((reg_2964 & 0x0000FFFF) - (reg_2964 >> 16));
	reg_2968 = 0x00010001 + ((reg_2968 & 0x0000FFFF) - (reg_2968 >> 16));

	/* Deviate further from what it should be. I find the flicker headache
	   inducing so try to reduce it slightly. Leave 2968 as-is otherwise
	   colours foul. */
	if ((reg_2964 != 0x00010001) && (window->dst_h / 2 <= window->src_h))
		reg_2964 = (reg_2964 & 0xFFFF0000) + ((reg_2964 & 0x0000FFFF)/2);

	if (!window->interlaced_y) reg_2964 -= 0x00010001;
	if (!window->interlaced_uv) reg_2968 -= 0x00010001;

	reg_2964 += ((reg_2964_base << 16) | reg_2964_base);
	reg_2968 += ((reg_2968_base << 16) | reg_2968_base);

	/* Select the vertical filter */
	if (window->src_h == window->dst_h) {
		/* An exact size match uses filter 0/1 */
		v_filter_1 = 0;
		v_filter_2 = 1;
	}
	else {
		/* Figure out which filter to use */
		v_filter_1 = ((window->src_h << 16) / window->dst_h) >> 15;
		v_filter_1 = (v_filter_1 >> 1) + (v_filter_1 & 1);
		/* Only an exact size match can use filter 0 */
		if (v_filter_1 == 0) v_filter_1 = 1;
		v_filter_2 = v_filter_1;
	}

	write_reg(reg_2934, 0x02934);
	write_reg(reg_293c, 0x0293c);
	IVTV_DEBUG_YUV("Update reg 0x2934 %08x->%08x 0x293c %08x->%08x\n",itv->yuv_info.reg_2934, reg_2934, itv->yuv_info.reg_293c, reg_293c);
	write_reg(reg_2944, 0x02944);
	write_reg(reg_294c, 0x0294c);
	IVTV_DEBUG_YUV("Update reg 0x2944 %08x->%08x 0x294c %08x->%08x\n",itv->yuv_info.reg_2944, reg_2944, itv->yuv_info.reg_294c, reg_294c);

	/* Ensure 2970 is 0 (does it ever change ?) */
/*	write_reg(0,0x02970); */
/*	IVTV_DEBUG_YUV("Update reg 0x2970 %08x->%08x\n",itv->yuv_info.reg_2970, 0); */

	write_reg(reg_2930, 0x02938);
	write_reg(reg_2930, 0x02930);
	IVTV_DEBUG_YUV("Update reg 0x2930 %08x->%08x 0x2938 %08x->%08x\n",itv->yuv_info.reg_2930, reg_2930, itv->yuv_info.reg_2938, reg_2930);

	write_reg(reg_2928, 0x02928);
	write_reg(reg_2928+0x514, 0x0292C);
	IVTV_DEBUG_YUV("Update reg 0x2928 %08x->%08x 0x292c %08x->%08x\n",itv->yuv_info.reg_2928, reg_2928, itv->yuv_info.reg_292c, reg_2928+0x514);

	write_reg(reg_2920, 0x02920);
	write_reg(reg_2920+0x514, 0x02924);
	IVTV_DEBUG_YUV("Update reg 0x2920 %08x->%08x 0x2924 %08x->%08x\n",itv->yuv_info.reg_2920, reg_2920, itv->yuv_info.reg_2924, 0x514+reg_2920);

	write_reg (reg_2918,0x02918);
	write_reg (reg_291c,0x0291C);
	IVTV_DEBUG_YUV("Update reg 0x2918 %08x->%08x 0x291C %08x->%08x\n",itv->yuv_info.reg_2918,reg_2918,itv->yuv_info.reg_291c,reg_291c);

	write_reg(reg_296c, 0x0296c);
	IVTV_DEBUG_YUV("Update reg 0x296c %08x->%08x\n",itv->yuv_info.reg_296c, reg_296c);

	write_reg(reg_2940, 0x02948);
	write_reg(reg_2940, 0x02940);
	IVTV_DEBUG_YUV("Update reg 0x2940 %08x->%08x 0x2948 %08x->%08x\n",itv->yuv_info.reg_2940, reg_2940, itv->yuv_info.reg_2948, reg_2940);

	write_reg(reg_2950, 0x02950);
	write_reg(reg_2954, 0x02954);
	IVTV_DEBUG_YUV("Update reg 0x2950 %08x->%08x 0x2954 %08x->%08x\n",itv->yuv_info.reg_2950, reg_2950, itv->yuv_info.reg_2954, reg_2954);

	write_reg(reg_2958, 0x02958);
	write_reg(reg_295c, 0x0295C);
	IVTV_DEBUG_YUV("Update reg 0x2958 %08x->%08x 0x295C %08x->%08x\n",itv->yuv_info.reg_2958, reg_2958, itv->yuv_info.reg_295c, reg_295c);

	write_reg(reg_2960, 0x02960);
	IVTV_DEBUG_YUV("Update reg 0x2960 %08x->%08x \n",itv->yuv_info.reg_2960, reg_2960);

	write_reg(reg_2964, 0x02964);
	write_reg(reg_2968, 0x02968);
	IVTV_DEBUG_YUV("Update reg 0x2964 %08x->%08x 0x2968 %08x->%08x\n",itv->yuv_info.reg_2964, reg_2964, itv->yuv_info.reg_2968, reg_2968);

	write_reg( reg_289c,0x0289c);
	IVTV_DEBUG_YUV("Update reg 0x289c %08x->%08x\n",itv->yuv_info.reg_289c, reg_289c);

	/* Only update filter 1 if we really need to */
	if (v_filter_1 != itv->yuv_info.v_filter_1) {
		ivtv_yuv_filter (itv,-1,v_filter_1,-1);
		itv->yuv_info.v_filter_1 = v_filter_1;
	}

	/* Only update filter 2 if we really need to */
	if (v_filter_2 != itv->yuv_info.v_filter_2) {
		ivtv_yuv_filter (itv,-1,-1,v_filter_2);
		itv->yuv_info.v_filter_2 = v_filter_2;
	}

}

/* Modify the supplied coordinate information to fit the visible osd area */
633
static u32 ivtv_yuv_window_setup(struct ivtv *itv, struct yuv_frame_info *f)
634
{
635 636
	struct yuv_frame_info *of = &itv->yuv_info.old_frame_info;
	int osd_crop;
637 638 639 640
	u32 osd_scale;
	u32 yuv_update = 0;

	/* Sorry, but no negative coords for src */
641 642 643 644
	if (f->src_x < 0)
		f->src_x = 0;
	if (f->src_y < 0)
		f->src_y = 0;
645 646

	/* Can only reduce width down to 1/4 original size */
647 648 649 650 651
	if ((osd_crop = f->src_w - 4 * f->dst_w) > 0) {
		f->src_x += osd_crop / 2;
		f->src_w = (f->src_w - osd_crop) & ~3;
		f->dst_w = f->src_w / 4;
		f->dst_w += f->dst_w & 1;
652 653 654
	}

	/* Can only reduce height down to 1/4 original size */
655 656 657 658
	if (f->src_h / f->dst_h >= 2) {
		/* Overflow may be because we're running progressive,
		   so force mode switch */
		f->interlaced_y = 1;
659
		/* Make sure we're still within limits for interlace */
660
		if ((osd_crop = f->src_h - 4 * f->dst_h) > 0) {
661
			/* If we reach here we'll have to force the height. */
662 663 664 665
			f->src_y += osd_crop / 2;
			f->src_h = (f->src_h - osd_crop) & ~3;
			f->dst_h = f->src_h / 4;
			f->dst_h += f->dst_h & 1;
666 667 668 669
		}
	}

	/* If there's nothing to safe to display, we may as well stop now */
670 671
	if ((int)f->dst_w <= 2 || (int)f->dst_h <= 2 ||
		    (int)f->src_w <= 2 || (int)f->src_h <= 2) {
672
		return IVTV_YUV_UPDATE_INVALID;
673 674 675
	}

	/* Ensure video remains inside OSD area */
676
	osd_scale = (f->src_h << 16) / f->dst_h;
677

678
	if ((osd_crop = f->pan_y - f->dst_y) > 0) {
679
		/* Falls off the upper edge - crop */
680 681 682 683 684 685
		f->src_y += (osd_scale * osd_crop) >> 16;
		f->src_h -= (osd_scale * osd_crop) >> 16;
		f->dst_h -= osd_crop;
		f->dst_y = 0;
	} else {
		f->dst_y -= f->pan_y;
686 687
	}

688
	if ((osd_crop = f->dst_h + f->dst_y - f->vis_h) > 0) {
689
		/* Falls off the lower edge - crop */
690 691
		f->dst_h -= osd_crop;
		f->src_h -= (osd_scale * osd_crop) >> 16;
692 693
	}

694
	osd_scale = (f->src_w << 16) / f->dst_w;
695

696
	if ((osd_crop = f->pan_x - f->dst_x) > 0) {
697
		/* Fall off the left edge - crop */
698 699 700 701 702 703
		f->src_x += (osd_scale * osd_crop) >> 16;
		f->src_w -= (osd_scale * osd_crop) >> 16;
		f->dst_w -= osd_crop;
		f->dst_x = 0;
	} else {
		f->dst_x -= f->pan_x;
704 705
	}

706
	if ((osd_crop = f->dst_w + f->dst_x - f->vis_w) > 0) {
707
		/* Falls off the right edge - crop */
708 709
		f->dst_w -= osd_crop;
		f->src_w -= (osd_scale * osd_crop) >> 16;
710 711 712
	}

	/* The OSD can be moved. Track to it */
713 714
	f->dst_x += itv->yuv_info.osd_x_offset;
	f->dst_y += itv->yuv_info.osd_y_offset;
715 716 717

	/* Width & height for both src & dst must be even.
	   Same for coordinates. */
718 719
	f->dst_w &= ~1;
	f->dst_x &= ~1;
720

721 722
	f->src_w += f->src_x & 1;
	f->src_x &= ~1;
723

724 725
	f->src_w &= ~1;
	f->dst_w &= ~1;
726

727 728
	f->dst_h &= ~1;
	f->dst_y &= ~1;
729

730 731
	f->src_h += f->src_y & 1;
	f->src_y &= ~1;
732

733 734
	f->src_h &= ~1;
	f->dst_h &= ~1;
735

736 737 738 739 740 741 742
	/* Due to rounding, we may have reduced the output size to <1/4 of
	   the source. Check again, but this time just resize. Don't change
	   source coordinates */
	if (f->dst_w < f->src_w / 4) {
		f->src_w &= ~3;
		f->dst_w = f->src_w / 4;
		f->dst_w += f->dst_w & 1;
743
	}
744 745 746 747
	if (f->dst_h < f->src_h / 4) {
		f->src_h &= ~3;
		f->dst_h = f->src_h / 4;
		f->dst_h += f->dst_h & 1;
748 749 750
	}

	/* Check again. If there's nothing to safe to display, stop now */
751 752
	if ((int)f->dst_w <= 2 || (int)f->dst_h <= 2 ||
		    (int)f->src_w <= 2 || (int)f->src_h <= 2) {
753
		return IVTV_YUV_UPDATE_INVALID;
754 755 756
	}

	/* Both x offset & width are linked, so they have to be done together */
757 758 759
	if ((of->dst_w != f->dst_w) || (of->src_w != f->src_w) ||
		    (of->dst_x != f->dst_x) || (of->src_x != f->src_x) ||
		    (of->pan_x != f->pan_x) || (of->vis_w != f->vis_w)) {
760 761 762
		yuv_update |= IVTV_YUV_UPDATE_HORIZONTAL;
	}

763 764 765 766 767 768
	if ((of->src_h != f->src_h) || (of->dst_h != f->dst_h) ||
		    (of->dst_y != f->dst_y) || (of->src_y != f->src_y) ||
		    (of->pan_y != f->pan_y) || (of->vis_h != f->vis_h) ||
		    (of->lace_mode != f->lace_mode) ||
		    (of->interlaced_y != f->interlaced_y) ||
		    (of->interlaced_uv != f->interlaced_uv)) {
769 770 771 772 773 774 775
		yuv_update |= IVTV_YUV_UPDATE_VERTICAL;
	}

	return yuv_update;
}

/* Update the scaling register to the requested value */
776
void ivtv_yuv_work_handler (struct ivtv *itv)
777
{
778 779 780
	struct yuv_playback_info *yi = &itv->yuv_info;
	struct yuv_frame_info f;
	int frame = yi->update_frame;
781 782 783
	u32 yuv_update;

/*	IVTV_DEBUG_YUV("Update yuv registers for frame %d\n",frame); */
784
	f = yi->new_frame_info[frame];
785 786

	/* Update the osd pan info */
787 788 789 790
	f.pan_x = itv->yuv_info.osd_x_pan;
	f.pan_y = itv->yuv_info.osd_y_pan;
	f.vis_w = itv->yuv_info.osd_vis_w;
	f.vis_h = itv->yuv_info.osd_vis_h;
791 792

	/* Calculate the display window coordinates. Exit if nothing left */
793
	if (!(yuv_update = ivtv_yuv_window_setup (itv, &f)))
794 795
		return;

796 797 798 799
	if (yuv_update & IVTV_YUV_UPDATE_INVALID) {
		write_reg(0x01008080, 0x2898);
	} else if (yuv_update) {
		write_reg(0x00108080, 0x2898);
800

801
		if (yuv_update & IVTV_YUV_UPDATE_HORIZONTAL)
802
			ivtv_yuv_handle_horizontal(itv, &f);
803 804

		if (yuv_update & IVTV_YUV_UPDATE_VERTICAL)
805
			ivtv_yuv_handle_vertical(itv, &f);
806
	}
807
	yi->old_frame_info = f;
808 809 810 811
}

static void ivtv_yuv_init (struct ivtv *itv)
{
812 813
	struct yuv_playback_info *yi = &itv->yuv_info;

814 815 816
	IVTV_DEBUG_YUV("ivtv_yuv_init\n");

	/* Take a snapshot of the current register settings */
817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
	yi->reg_2834 = read_reg(0x02834);
	yi->reg_2838 = read_reg(0x02838);
	yi->reg_283c = read_reg(0x0283c);
	yi->reg_2840 = read_reg(0x02840);
	yi->reg_2844 = read_reg(0x02844);
	yi->reg_2848 = read_reg(0x02848);
	yi->reg_2854 = read_reg(0x02854);
	yi->reg_285c = read_reg(0x0285c);
	yi->reg_2864 = read_reg(0x02864);
	yi->reg_2870 = read_reg(0x02870);
	yi->reg_2874 = read_reg(0x02874);
	yi->reg_2898 = read_reg(0x02898);
	yi->reg_2890 = read_reg(0x02890);

	yi->reg_289c = read_reg(0x0289c);
	yi->reg_2918 = read_reg(0x02918);
	yi->reg_291c = read_reg(0x0291c);
	yi->reg_2920 = read_reg(0x02920);
	yi->reg_2924 = read_reg(0x02924);
	yi->reg_2928 = read_reg(0x02928);
	yi->reg_292c = read_reg(0x0292c);
	yi->reg_2930 = read_reg(0x02930);
	yi->reg_2934 = read_reg(0x02934);
	yi->reg_2938 = read_reg(0x02938);
	yi->reg_293c = read_reg(0x0293c);
	yi->reg_2940 = read_reg(0x02940);
	yi->reg_2944 = read_reg(0x02944);
	yi->reg_2948 = read_reg(0x02948);
	yi->reg_294c = read_reg(0x0294c);
	yi->reg_2950 = read_reg(0x02950);
	yi->reg_2954 = read_reg(0x02954);
	yi->reg_2958 = read_reg(0x02958);
	yi->reg_295c = read_reg(0x0295c);
	yi->reg_2960 = read_reg(0x02960);
	yi->reg_2964 = read_reg(0x02964);
	yi->reg_2968 = read_reg(0x02968);
	yi->reg_296c = read_reg(0x0296c);
	yi->reg_2970 = read_reg(0x02970);

	yi->v_filter_1 = -1;
	yi->v_filter_2 = -1;
	yi->h_filter = -1;
859 860

	/* Set some valid size info */
861 862
	yi->osd_x_offset = read_reg(0x02a04) & 0x00000FFF;
	yi->osd_y_offset = (read_reg(0x02a04) >> 16) & 0x00000FFF;
863 864 865 866

	/* Bit 2 of reg 2878 indicates current decoder output format
	   0 : NTSC    1 : PAL */
	if (read_reg(0x2878) & 4)
867
		yi->decode_height = 576;
868
	else
869
		yi->decode_height = 480;
870

871 872 873
	if (!itv->osd_info) {
		yi->osd_vis_w = 720 - yi->osd_x_offset;
		yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
874
	} else {
875 876 877 878 879 880 881 882 883 884 885 886 887 888 889
		/* If no visible size set, assume full size */
		if (!yi->osd_vis_w)
			yi->osd_vis_w = 720 - yi->osd_x_offset;

		if (!yi->osd_vis_h)
			yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
		else {
			/* If output video standard has changed, requested height may
			not be legal */
			if (yi->osd_vis_h + yi->osd_y_offset > yi->decode_height) {
				IVTV_DEBUG_WARN("Clipping yuv output - fb size (%d) exceeds video standard limit (%d)\n",
						yi->osd_vis_h + yi->osd_y_offset,
						yi->decode_height);
				yi->osd_vis_h = yi->decode_height - yi->osd_y_offset;
			}
890 891
		}
	}
892 893

	/* We need a buffer for blanking when Y plane is offset - non-fatal if we can't get one */
894 895 896
	yi->blanking_ptr = kzalloc(720*16, GFP_KERNEL);
	if (yi->blanking_ptr)
		yi->blanking_dmaptr = pci_map_single(itv->dev, yi->blanking_ptr, 720*16, PCI_DMA_TODEVICE);
897
	else {
898 899
		yi->blanking_dmaptr = 0;
		IVTV_DEBUG_WARN("Failed to allocate yuv blanking buffer\n");
900 901 902 903 904 905
	}

	/* Enable YUV decoder output */
	write_reg_sync(0x01, IVTV_REG_VDM);

	set_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags);
906
	atomic_set(&yi->next_dma_frame, 0);
907 908
}

909 910
/* Get next available yuv buffer on PVR350 */
void ivtv_yuv_next_free(struct ivtv *itv)
911
{
912 913
	int draw, display;
	struct yuv_playback_info *yi = &itv->yuv_info;
914

915 916
	if (atomic_read(&yi->next_dma_frame) == -1)
		ivtv_yuv_init(itv);
917

918 919
	draw = atomic_read(&yi->next_fill_frame);
	display = atomic_read(&yi->next_dma_frame);
920

921 922
	if (display > draw)
		display -= IVTV_YUV_BUFFERS;
923

924 925 926 927 928 929 930 931 932 933 934 935 936
	if (draw - display >= yi->max_frames_buffered)
		draw = (u8)(draw - 1) % IVTV_YUV_BUFFERS;
	else
		yi->new_frame_info[draw].update = 0;

	yi->draw_frame = draw;
}

/* Set up frame according to ivtv_dma_frame parameters */
void ivtv_yuv_setup_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
{
	struct yuv_playback_info *yi = &itv->yuv_info;
	u8 frame = yi->draw_frame;
937 938 939 940
	u8 last_frame = (u8)(frame - 1) % IVTV_YUV_BUFFERS;
	struct yuv_frame_info *nf = &yi->new_frame_info[frame];
	struct yuv_frame_info *of = &yi->new_frame_info[last_frame];
	int lace_threshold = yi->lace_threshold;
941 942

	/* Preserve old update flag in case we're overwriting a queued frame */
943
	int update = nf->update;
944 945

	/* Take a snapshot of the yuv coordinate information */
946 947 948 949 950 951 952 953 954 955 956
	nf->src_x = args->src.left;
	nf->src_y = args->src.top;
	nf->src_w = args->src.width;
	nf->src_h = args->src.height;
	nf->dst_x = args->dst.left;
	nf->dst_y = args->dst.top;
	nf->dst_w = args->dst.width;
	nf->dst_h = args->dst.height;
	nf->tru_x = args->dst.left;
	nf->tru_w = args->src_width;
	nf->tru_h = args->src_height;
957

958
	/* Are we going to offset the Y plane */
959
	nf->offset_y = (nf->tru_h + nf->src_x < 512 - 16) ? 1 : 0;
960 961

	/* Snapshot the osd pan info */
962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017
	nf->pan_x = yi->osd_x_pan;
	nf->pan_y = yi->osd_y_pan;
	nf->vis_w = yi->osd_vis_w;
	nf->vis_h = yi->osd_vis_h;

	nf->update = 0;
	nf->interlaced_y = 0;
	nf->interlaced_uv = 0;
	nf->delay = 0;
	nf->sync_field = 0;
	nf->lace_mode = yi->lace_mode & IVTV_YUV_MODE_MASK;

	if (lace_threshold < 0)
		lace_threshold = yi->decode_height - 1;

	/* Work out the lace settings */
	switch (nf->lace_mode) {
	case IVTV_YUV_MODE_PROGRESSIVE: /* Progressive mode */
		nf->interlaced = 0;
		if (nf->tru_h < 512 || (nf->tru_h > 576 && nf->tru_h < 1021))
			nf->interlaced_y = 0;
		else
			nf->interlaced_y = 1;

		if (nf->tru_h < 1021 && (nf->dst_h >= nf->src_h / 2))
			nf->interlaced_uv = 0;
		else
			nf->interlaced_uv = 1;
		break;

	case IVTV_YUV_MODE_AUTO:
		if (nf->tru_h <= lace_threshold || nf->tru_h > 576 || nf->tru_w > 720) {
			nf->interlaced = 0;
			if ((nf->tru_h < 512) ||
				 (nf->tru_h > 576 && nf->tru_h < 1021) ||
				 (nf->tru_w > 720 && nf->tru_h < 1021))
				nf->interlaced_y = 0;
			else
				nf->interlaced_y = 1;
			if (nf->tru_h < 1021 && (nf->dst_h >= nf->src_h / 2))
				nf->interlaced_uv = 0;
			else
				nf->interlaced_uv = 1;
		} else {
			nf->interlaced = 1;
			nf->interlaced_y = 1;
			nf->interlaced_uv = 1;
		}
		break;

	case IVTV_YUV_MODE_INTERLACED: /* Interlace mode */
	default:
		nf->interlaced = 1;
		nf->interlaced_y = 1;
		nf->interlaced_uv = 1;
		break;
1018 1019
	}

1020 1021 1022 1023 1024
	if (memcmp(&yi->old_frame_info_args, nf, sizeof(*nf))) {
		yi->old_frame_info_args = *nf;
		nf->update = 1;
/* IVTV_DEBUG_YUV ("Requesting register update for frame %d\n",frame); */
	}
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1026 1027 1028
	nf->update |= update;
	nf->sync_field = yi->lace_sync_field;
	nf->delay = nf->sync_field != of->sync_field;
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}

/* Frame is complete & ready for display */
void ivtv_yuv_frame_complete(struct ivtv *itv)
{
	atomic_set(&itv->yuv_info.next_fill_frame,
			(itv->yuv_info.draw_frame + 1) % IVTV_YUV_BUFFERS);
}

int ivtv_yuv_prep_frame(struct ivtv *itv, struct ivtv_dma_frame *args)
{
	DEFINE_WAIT(wait);
	int rc = 0;
	int got_sig = 0;

	IVTV_DEBUG_INFO("yuv_prep_frame\n");

	ivtv_yuv_next_free(itv);
	ivtv_yuv_setup_frame(itv, args);
1048

1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
	/* DMA the frame */
	mutex_lock(&itv->udma.lock);

	if ((rc = ivtv_yuv_prep_user_dma(itv, &itv->udma, args)) != 0) {
		mutex_unlock(&itv->udma.lock);
		return rc;
	}

	ivtv_udma_prepare(itv);
	prepare_to_wait(&itv->dma_waitq, &wait, TASK_INTERRUPTIBLE);
	/* if no UDMA is pending and no UDMA is in progress, then the DMA
	is finished */
	while (itv->i_flags & (IVTV_F_I_UDMA_PENDING | IVTV_F_I_UDMA)) {
		/* don't interrupt if the DMA is in progress but break off
		a still pending DMA. */
		got_sig = signal_pending(current);
		if (got_sig && test_and_clear_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags))
			break;
		got_sig = 0;
		schedule();
	}
	finish_wait(&itv->dma_waitq, &wait);

	/* Unmap Last DMA Xfer */
	ivtv_udma_unmap(itv);

	if (got_sig) {
		IVTV_DEBUG_INFO("User stopped YUV UDMA\n");
		mutex_unlock(&itv->udma.lock);
		return -EINTR;
	}

1081
	ivtv_yuv_frame_complete(itv);
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	mutex_unlock(&itv->udma.lock);
	return rc;
}

void ivtv_yuv_close(struct ivtv *itv)
{
	int h_filter, v_filter_1, v_filter_2;

	IVTV_DEBUG_YUV("ivtv_yuv_close\n");
	ivtv_waitq(&itv->vsync_waitq);

	atomic_set(&itv->yuv_info.next_dma_frame, -1);
	atomic_set(&itv->yuv_info.next_fill_frame, 0);

	/* Reset registers we have changed so mpeg playback works */

	/* If we fully restore this register, the display may remain active.
	   Restore, but set one bit to blank the video. Firmware will always
	   clear this bit when needed, so not a problem. */
	write_reg(itv->yuv_info.reg_2898 | 0x01000000, 0x2898);

	write_reg(itv->yuv_info.reg_2834, 0x02834);
	write_reg(itv->yuv_info.reg_2838, 0x02838);
	write_reg(itv->yuv_info.reg_283c, 0x0283c);
	write_reg(itv->yuv_info.reg_2840, 0x02840);
	write_reg(itv->yuv_info.reg_2844, 0x02844);
	write_reg(itv->yuv_info.reg_2848, 0x02848);
	write_reg(itv->yuv_info.reg_2854, 0x02854);
	write_reg(itv->yuv_info.reg_285c, 0x0285c);
	write_reg(itv->yuv_info.reg_2864, 0x02864);
	write_reg(itv->yuv_info.reg_2870, 0x02870);
	write_reg(itv->yuv_info.reg_2874, 0x02874);
	write_reg(itv->yuv_info.reg_2890, 0x02890);
	write_reg(itv->yuv_info.reg_289c, 0x0289c);

	write_reg(itv->yuv_info.reg_2918, 0x02918);
	write_reg(itv->yuv_info.reg_291c, 0x0291c);
	write_reg(itv->yuv_info.reg_2920, 0x02920);
	write_reg(itv->yuv_info.reg_2924, 0x02924);
	write_reg(itv->yuv_info.reg_2928, 0x02928);
	write_reg(itv->yuv_info.reg_292c, 0x0292c);
	write_reg(itv->yuv_info.reg_2930, 0x02930);
	write_reg(itv->yuv_info.reg_2934, 0x02934);
	write_reg(itv->yuv_info.reg_2938, 0x02938);
	write_reg(itv->yuv_info.reg_293c, 0x0293c);
	write_reg(itv->yuv_info.reg_2940, 0x02940);
	write_reg(itv->yuv_info.reg_2944, 0x02944);
	write_reg(itv->yuv_info.reg_2948, 0x02948);
	write_reg(itv->yuv_info.reg_294c, 0x0294c);
	write_reg(itv->yuv_info.reg_2950, 0x02950);
	write_reg(itv->yuv_info.reg_2954, 0x02954);
	write_reg(itv->yuv_info.reg_2958, 0x02958);
	write_reg(itv->yuv_info.reg_295c, 0x0295c);
	write_reg(itv->yuv_info.reg_2960, 0x02960);
	write_reg(itv->yuv_info.reg_2964, 0x02964);
	write_reg(itv->yuv_info.reg_2968, 0x02968);
	write_reg(itv->yuv_info.reg_296c, 0x0296c);
	write_reg(itv->yuv_info.reg_2970, 0x02970);

	/* Prepare to restore filters */

	/* First the horizontal filter */
	if ((itv->yuv_info.reg_2834 & 0x0000FFFF) == (itv->yuv_info.reg_2834 >> 16)) {
		/* An exact size match uses filter 0 */
		h_filter = 0;
	}
	else {
		/* Figure out which filter to use */
		h_filter = ((itv->yuv_info.reg_2834 << 16) / (itv->yuv_info.reg_2834 >> 16)) >> 15;
		h_filter = (h_filter >> 1) + (h_filter & 1);
		/* Only an exact size match can use filter 0. */
		if (h_filter < 1) h_filter = 1;
	}

	/* Now the vertical filter */
	if ((itv->yuv_info.reg_2918 & 0x0000FFFF) == (itv->yuv_info.reg_2918 >> 16)) {
		/* An exact size match uses filter 0/1 */
		v_filter_1 = 0;
		v_filter_2 = 1;
	}
	else {
		/* Figure out which filter to use */
		v_filter_1 = ((itv->yuv_info.reg_2918 << 16) / (itv->yuv_info.reg_2918 >> 16)) >> 15;
		v_filter_1 = (v_filter_1 >> 1) + (v_filter_1 & 1);
		/* Only an exact size match can use filter 0 */
		if (v_filter_1 == 0) v_filter_1 = 1;
		v_filter_2 = v_filter_1;
	}

	/* Now restore the filters */
	ivtv_yuv_filter (itv,h_filter,v_filter_1,v_filter_2);

	/* and clear a few registers */
	write_reg(0, 0x02814);
	write_reg(0, 0x0282c);
	write_reg(0, 0x02904);
	write_reg(0, 0x02910);

	/* Release the blanking buffer */
	if (itv->yuv_info.blanking_ptr) {
		kfree (itv->yuv_info.blanking_ptr);
		itv->yuv_info.blanking_ptr = NULL;
		pci_unmap_single(itv->dev, itv->yuv_info.blanking_dmaptr, 720*16, PCI_DMA_TODEVICE);
	}

	/* Invalidate the old dimension information */
	itv->yuv_info.old_frame_info.src_w = 0;
	itv->yuv_info.old_frame_info.src_h = 0;
	itv->yuv_info.old_frame_info_args.src_w = 0;
	itv->yuv_info.old_frame_info_args.src_h = 0;

	/* All done. */
	clear_bit(IVTV_F_I_DECODING_YUV, &itv->i_flags);
}